Marble Arch is a white Carrara marble monument near Speakers' Corner in Hyde Park, at the western end of Oxford Street in London, England, near the tube station of the same name. Only members of the royal family and the King's Troop, Royal Horse Artillery are allowed to pass through the arch.

The area around the arch forms a major road junction connecting Oxford Street to the east, Park Lane (A4202) to the south, Bayswater Road (A402) to the west, and Edgware Road (A5) to the north-west. The short road to the north of the arch is also known as Marble Arch.

The nearest underground station to Marble Arch is Marble Arch tube station which is on Central Line. Marble Arch station is in Travelcard Zone 1